Summary of Costs and Ranges of Useful Lives of the Major Classes of Property, Plant and Equipment and Total Accumulated Depreciation related to Property, Plant and Equipment, Net (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2011 Year	Dec. 31, 2010
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 531,588	$ 520,592
Less accumulated depreciation	(369,189)	(345,025)
Property, plant and equipment, net	162,399	175,567
Buildings, at cost
Property, Plant and Equipment [Line Items]
Property, plant and equipment	37,733	37,657
Property, plant and equipment, Minimum useful lives	10
Property, plant and equipment, Maximum useful lives	30
Machinery and equipment, at cost
Property, Plant and Equipment [Line Items]
Property, plant and equipment	231,694	225,762
Property, plant and equipment, Minimum useful lives	3
Property, plant and equipment, Maximum useful lives	20
Office furniture and equipment, at cost
Property, Plant and Equipment [Line Items]
Property, plant and equipment	226,827	221,804
Property, plant and equipment, Minimum useful lives	3
Property, plant and equipment, Maximum useful lives	10
Leasehold improvements, at cost
Property, Plant and Equipment [Line Items]
Property, plant and equipment	28,126	28,174
Property, plant and equipment, Minimum useful lives	5
Property, plant and equipment, Maximum useful lives	10
Land, at cost
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 7,208	$ 7,195